关键词: 模糊关系数据库, 非对称冗余元组, 弱相似关系, 相似关系

Abstract:

In the real world, some objects have more general meaning than the others, the degrees of similarity of two objects may not be symmetric. The relation of similarity between two objects may neither necessarily be symmetric nor transitive, we represent it by a weak similarity relation. This paper puts forward the asymmetric redundancy of tuples in a fuzzy relational database dealing with weak fuzzy similarity relations, the concept of asymmetric redundancy of tuples is the expansion of the concept of redundancy in the fuzzy relational database. It is used to delete some redundancy information, and represent more accurate information.

Key words: fuzzy relational database;asymmetric redundancy of tuples;weak similarity relation;similarity relation